Sound-box for recording and reproducing machines.



W. W. ZAUKEY. X FOR-RECORDING AND REPRODUGING MACHINES.

sown) B0 APPLICATION FILED MAR. 3, 1909.

Patented Aug. 10, 1909.

. of construction, all f 11 ent referred b r m f P 3 ITnn srArns PATENT onnron.

WILLIAM w. ZACKEY, or PHILADELPHIA, PENNSYLVANIA, AssIeNoR or FORTY-NINE ONE- HUN DREDTIES, T0

CHARLES B. HEWITT, OF BURLINGTON, NEW JERSEY.

SOUND-BOX FOR RECORDING AND REPRODUGINGMAQHINES.

To all whom it may concern: Be it known that I, WILLIAM citizen of the United States, residing in the city and county of Philadelphia, State. of ennsylvania, have invented a new and useful Sound-Box for Recording and Reproducing Machines, of which the following is a specification.

his invention relates to sound recording and reproducing machines and more particularly to that portion of sound recording and reproducing machines known as the sound ox. 1 In sound boxes for recording and reproucing machines, as heretofore constructed, the regulation and control of the vibrating, member or diaphragm has not'been such as to insure the' ro(luction,of the clearest, purest tones an the reproduction of perfect articulation and the like, while at the same time maintaining a desirable volume of sound. Even a near approach to a pure tone has only been accomplished by sacrificing sound volume and vice versa.

In my present invention I have devised a novel stylus sup orting means andi diaphragm. securing c evices whereby tone volume and tone quality have a direct relation one to the other and in which the stylus and its adjuncts may be manipulated desirefor a minimum or maximum volume while the tone quality is appreciably afiected.

It further consists of other novel features as' will be hereinafter u y set forth.

For the pur ose of illustrating my invention, I have shown in the accompanying drawings one form thereof which is at resme, since the same has een ound in practice to give satisfactory and reliable results, although it is to be understood that the various instrumentalities of which my invention consists can be variously arranged andorganized and that my invention organization of these mstrumentalities as herein shown and described.

Figure 1 represents a front elevation of a sound box embodying my invention. Fig. 2 represents aside elevation of the same. Fig. 3 represents a section on line x--a:, Fig. 1-.

Similar numerals of reference responding parts in the figures."

Specification of Letters Patent. Application filed March 3, 1909.

W. ZAOKEY, a

precise arrangement and indicate corof the spindle 15 durin t jthreaded aperture for Patented Aug. 10, 1909. serial Nb. 421 002.

Referrin to the drawings z-1 designates the sound box of a sound recording and reproducing machine preferably of ordinary shape and size and in the present instance consisting .of an annular ring 2, providedwith an overhanging rim 3 whereby a shouldered recess is formed, adapted to receive the adjuncts of thesound box.

Cooperating with the ring 2 is a cap 4, secured thereto by screws 5 or equivalent devices, and provided with an aperture 6 preferably at the center thereof in order to conduct sound vibrations as transmitted.

hese sound vibrations are received upona diaphragm 7 suitably mounted within the which are res ectively coated on opposite sides of the diap iram 7.

In order to maintain these tubes fixed y in. position, I referably employ a s "ring wire 10, interior y disposed in each tu e and of small relative diameter so that suflicient space is provided to permit free yielding of the tube under a vibratory movement. It

is well known. that the quality'of the sound produced dc )onds largely upon the mounting of this diaphragm and its being free from contact with metallic or other hard surfaces which tend to roduce a grating or undosirable sound. lie here shown, I employ fish strip of cork 11 within the annular rin 2 and in a position to prevent contact of tie diaphragm 7 with the ring 2, though, of course, any material having similar characteristics may be used. v 12 designates a stylus bar of usual con struction, which, in the present instance, I secure to the'dia hragm 7 by a screw 13 between which am the diaphragm 7 itself, in the present instance, I employ a bushing 14 of yielding material in order that the metallic portions v i With. the said diaphragm. as herein disclosed, is

provided with a pivotal movement 15 which latter is upon a threaded spindle 6 connected in an suitably secured in ears 1 suitable manner to the box 1. Suitable nuts 17 may be employed to revent movement e oscillatm of the stylus bar 12. .Speci attention is irected suitable threaded aperture 18 bar 12 into contact with. the spindle 15 to the mounting of the stylus bar 12 upon the screw threaded spindle 15, since thereby a firm bearing is provided, free from undesir-- the spindle 15. If, however, it is desire(. to

tone down the sound and reduce the loud effect, the set screw is tightened somewhat upon the spindle 15 thereby limiting more or less the oscillation of the stylus bar 12. Of course it will be understood that some means are necessary to make a complete vibration of the diaphragm 7 possible, that is to return it to normal position after a sound wave has been transmitted thereto and for this purpose I preferably provide a flexible spring 19, suitably mounted on the ears 16 and in a position to be placed under stress when a sound wave is received and react to return the stylus bar to normal osition at the end of the sound wave. In t 1e resent instance, this s ring 19 is held in p ace by clips 20 adjusta )ly mounted on the cars 16 by screws 21 or e uivalent devices, whereby it is possible, by loosening the said set screws, to change the position of the s )ring 19 and move the same over nearer to the spindle 15 thereby diminishing the leverage or moving it farther away increasing the leverage as the case may be. It will be understood, for

. perfect working of the sound box, that the diaphragm 7 should always normally be in neutral position and in order that the spring 19 may have no tendency to deflect t is diaphragm from such position, each ear 16 is provided with a slight taper 22 to allow for the thickness of the spring.

23 designates the usual reproducing needle, the same being securer in any well known detachable manner-to the stylus bar .12, as here shown, it is secured by a set screw 24.

Attention is directed to the securing mean .leverage obtained by the movable spring 19 is a very desirable feature as thereby an absolute control over the vibrating diaphragm is obtained so that the quantity of sound may be regulated to a nicet This feature combined with the adjusta ility of the stylus bar screw 18 renders it absolutely possible to corn trol the tone quality and sound quantity to obtain the perfect result.

It will now be apparent that I have devised a complete unitary structure ca able of producing in a sound recording 8.1M reproducing machine a tone rich in quality and variable as to quantity with the entire sounds so common in instruments this class. 4

In so far as I am aware, I am the first in g the art to provide a single stylus bar support performing the function of a pivot for correctly permitting oscillating movement of the stylus bar in such a manner as to eliminate all sounds tending to detract from the natural, full, clear tone.

I am aware that sound boxes have been variously devised and arranged in attempts to overcome defects of tone and the like and that it is well known practice to rovide a number of knife-edge pivots for tie stylus bar, but these, owing to. the large wearing surface, soon develop lost motion and render the sound box practically useless and by my invention I'haveovercome all of such defects.

. Having thus describedr my invention, what I claim as new and desire to secure by Letters Patent, is

1. In a sound recording and reproducing machine, a sound box, a diaphragm therein, ithreaded spindle mounts on said sound box, a stylus bar. secured to said diaphragm oration with said spindle, and adjusting means for regulating movement of said stylus bar.

'2. In a sound recording and reproducing machine, a sound box having a dia hragm therein, a spindle mounted on sai sound box, a stylus bar pivotally mounted on said s indle and secured at one end to said diap ragm, a spring mounted on said sound box or engagement with the free end of said stylus bar, and means for varying the point of engagement of the spring with the stylus arm.

3.In a sound recording and reproducing machine, a sound box having a diaphragm therein, a threaded spindle mounted on said sound box, a stylus bar carried by said spindle and secured at one end to said diaphragm, a spring mounted on said sound box for engagement with the free end of said. stylus bar, and means for varying the point of engagement of the spring with the stylus arm.

4. In a sound recording and reproducing machine, a sound box having a dia hragm therein, a spindle mounted on sai sound box, a stylus bar pivotally mounted on said l spindle and secured at one end to said diahaving a threaded opening therein for coop-' elimination of metallic, grinding or scratchy therein, a spindle borg a stylus b machine, a sound box, a

hragm, a spring mounted on said phragm and means in each tube to or engagement with the v the same in operative position. v lus' bar, means for Vary point of eIr- 7. In a sound recording and reproducing gagement of the s ring with the stylus arm machine, a sound box comprising an annular and means to regulate .the movement of said. ring, having a shouldered recess therein; a

stylus bar. diaphragm insaid recess, a tube .on each side maintain v 8. In a sound recording and reproducing l machine, a sound box, a diaphragm therein; and a l a tube on each side of said diaphragm, and secured to said stylus bar means in each tube to maintain the same in operative position.

W ILLIAM W. ZACKEY. Witnesses:

CHAs. B. HEWITT, C. D. MOVAY.

s uidle and i spring adjustably and said ears. l 6. In a sound recording andreproducing diaphragm therein, 9 sound deadening material encircling said diaphragm, a tube on each side of said dia- 

